"Forbidding the relationship to continue is only going to cause resistance, and close off communication. On the other hand, it would be foolhardy and irresponsible to allow the child to fend for herself when so inexperienced in relationships. In my opinion, the best first step toward a solution is to attempt to involve both parties in communication, and persuade them to go to counseling. Many boys are very insecure at a young age, and have ideas of how a 'man should act.' I would get your daughter to ask herself some questions; what she truly wants for her life, what are her goals, etc. It may seem like a very difficult thing to do, but she needs to take care of herself first. Her self-esteem will be better served by being strong in her own choices. I'd give her a lot of support, and try to get her to make the right choice on her own."
"This is a big warning sign of an abusive relationship. I would call the local domestic abuse information center and see how they suggest dealing with this."
"Have you talked to her to see what she really wants? I would just encourage her to go for her dream and to keep an open mind. She and her boyfriend really needs to sit down and have a rational conversation, maybe even with someone refereeing in case something would get out of hand."